/*
 * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.engine.impl.variable;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class JsonType implements VariableType {

    private static final Logger logger = LoggerFactory.getLogger(JsonType.class);
    public static final String JSON = "json";

    private final int maxLength;
    private ObjectMapper objectMapper;
    private boolean serializePOJOsInVariablesToJson;
    private JsonTypeConverter jsonTypeConverter;

    public JsonType(
        int maxLength,
        ObjectMapper objectMapper,
        boolean serializePOJOsInVariablesToJson,
        JsonTypeConverter jsonTypeConverter
    ) {
        this.maxLength = maxLength;
        this.objectMapper = objectMapper;
        this.serializePOJOsInVariablesToJson = serializePOJOsInVariablesToJson;
        this.jsonTypeConverter = jsonTypeConverter;
    }

    public String getTypeName() {
        return JSON;
    }

    public boolean isCachable() {
        return true;
    }

    public Object getValue(ValueFields valueFields) {
        Object loadedValue = null;
        if (valueFields.getTextValue() != null && valueFields.getTextValue().length() > 0) {
            try {
                loadedValue = jsonTypeConverter.convertToValue(
                    objectMapper.readTree(valueFields.getTextValue()),
                    valueFields
                );
            } catch (Exception e) {
                logger.error("Error reading json variable " + valueFields.getName(), e);
            }
        }
        return loadedValue;
    }

    public void setValue(Object value, ValueFields valueFields) {
        try {
            valueFields.setTextValue(objectMapper.writeValueAsString(value));
            if (value != null) {
                valueFields.setTextValue2(value.getClass().getName());
            }
        } catch (JsonProcessingException e) {
            logger.error("Error writing json variable " + valueFields.getName(), e);
        }
    }

    public boolean isAbleToStore(Object value) {
        if (value == null) {
            return true;
        }

        if (
            JsonNode.class.isAssignableFrom(value.getClass()) ||
            (objectMapper.canSerialize(value.getClass()) && serializePOJOsInVariablesToJson)
        ) {
            try {
                return objectMapper.writeValueAsString(value).length() <= maxLength;
            } catch (JsonProcessingException e) {
                logger.error("Error writing json variable of type " + value.getClass(), e);
            }
        }

        return false;
    }
}
